You don't always have to use mods. Yes, most things might be easier with it but you can also spin regular pens like this Schneider Slider.
Oh and it's a great writing pen, too!
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Pen used: Schneider Slider Rave XB
Struggling with learning? You might doodled before in class and there is a reason for it: movements like drawing and writing help the brain to learn better because it can create more "connections". It's like you remember a situation when you hear a specific part of a song you heard back than in this situation.
Some people do need something in their hands to turn their energy into focus - that's why fidget gadgets are so popular. But you actually don't need them because you can use a regular pen and learn some tricks. Helped me a lot and does still. :)
It doens’t need much to train your brain so challenge yourself and start spinning!
Penspinning is a unique art of contact juggling - the art of spinning a pen! It comes with a lot of positive aspects as it improves your concentration, your focus, finger flexibility and more.
It's a great way to train your brain, keep your hands busy and calm down, even though you will I to get a much higher frustration tolerance at first. ;)
A little fun video I made to test a new pen. But yeah, Penspinning can look like something not from this world!